Is Aqua Marine expensive?
Fine aquamarine is rare and expensive. Large gems with intense color that are selling for less than $100 are unlikely to be aquamarine. Aquamarine is 7. Mohs scale, so it is a durable gemstone for jewelry as long as it is treated with care to protect it against scratching and hard knocks. Aquamarine rates a 7. Mohs hardness scale. Heat exposure is not recommended for aquamarine, but the color is stable against light exposure.